opalinum, Myctophum Goode [G. B.] & Bean [T. H.] 1896:72, Pl. 22 (fig. 81) [Special Bulletin U. S. National Museum No. 2; ref. 1848] Gulf Stream, western Atlantic. Lectotype: USNM 43808. Paralectotypes: MCZ 27684 [ex USNM 43799] (1); USNM 43798-99 (11, 30), 43800 (1), 43802-07 (1, 1, 2, 1, 1, 20), 43809 (1), 92816 (1), 147799 [ex 43807] (1), 147800 and 147801 [ex 43808] (1, 1), 150700 (1). Lectotype established by Jordan & Evermann 1896:571 [ref. 2443] or else by Paxton 1979: [ref. 6440]. •Questionably a synonym of Myctophum affine (Lütken 1892) -- (Paxton 1979:15 [ref. 6440]). Current status: Uncertain as Myctophum affine (Lütken 1892). Myctophidae: Myctophinae. Habitat: marine.